English verb conjugation
CAN DERAIL

Regular verb: derail - derailed - derailed

Affirmation

Simple form	V-ing form
I can derail you can derail he can derail we can derail you can derail they can derail	I can be derailing you can be derailing he can be derailing we can be derailing you can be derailing they can be derailing
Perfect	V-ing perfect
I can have derailed you can have derailed he can have derailed we can have derailed you can have derailed they can have derailed	I can have been derailing you can have been derailing he can have been derailing we can have been derailing you can have been derailing they can have been derailing

Negation

Simple form	V-ing form
I can't derail you can't derail he can't derail we can't derail you can't derail they can't derail	I can't be derailing you can't be derailing he can't be derailing we can't be derailing you can't be derailing they can't be derailing
Perfect	V-ing perfect
I can't have derailed you can't have derailed he can't have derailed we can't have derailed you can't have derailed they can't have derailed	I can't have been derailing you can't have been derailing he can't have been derailing we can't have been derailing you can't have been derailing they can't have been derailing

Interrogative form

Simple form	V-ing form
can I derail? can you derail? can he derail? can we derail? can you derail? can they derail?	can I be derailing? can you be derailing? can he be derailing? can we be derailing? can you be derailing? can they be derailing?
Perfect	V-ing perfect
can I have derailed? can you have derailed? can he have derailed? can we have derailed? can you have derailed? can they have derailed?	can I have been derailing? can you have been derailing? can he have been derailing? can we have been derailing? can you have been derailing? can they have been derailing?

Interro-negative form

Simple form	V-ing form
can't I derail? can't you derail? can't he derail? can't we derail? can't you derail? can't they derail?	can't I be derailing? can't you be derailing? can't he be derailing? can't we be derailing? can't you be derailing? can't they be derailing?
Perfect	V-ing perfect
can't I have derailed? can't you have derailed? can't he have derailed? can't we have derailed? can't you have derailed? can't they have derailed?	can't I have been derailing? can't you have been derailing? can't he have been derailing? can't we have been derailing? can't you have been derailing? can't they have been derailing?